Improvement in ahgand-lamfs



A. VB. HOWLAND.

Lamp.

Patented Sept. 2h |869.

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`Laim raam No.' 94,961, ama samba 21, 1369.

IMPRQVEMENT IN ARGAND-LAMPS.

The Schedule referred to in these Letters Patent making part of the salme. l

To'all whom# ma/y concern:

Be it known thattLANnRnw B. HowLAN'D, of the city of Titusville, county of Crawford, and Stateof P ennsylvahia,`have invented certain new and useful Improvements inArgaud-Lamps; a'nd I do here-A by declare that the following isa full, clear, and 'exact description thereof, `reference being had tothe accompanying drawings, Wh'iclifbrm 'a part of ithis speciflcation.

My invention relates to the class of lamps in which an annular wick is used. 'cofinmonly denominated argaud-lampsfaud Vin.Whicnthe air is supplied to the interior surface of the amethrough an open vertical tube extending from thev bottomof the lamp to the centre of the llame; Such lamps'were originally made entirelyof metal, but were too `expensive-for common use. They have also been madewith'a glass bulb or 'oil-reservoir, through which air was supplied by means of a central metal tube, the joint at the bottom of the lamp being made tight by cement. By Qthe latter arrangement, the cost, of the lamp was materially reduced, and it gave satisfaction so long as carnphene,

. resin, whale-oil, Src., were used; but, sincetheintroduction and almost universal use of kerosene for-illu minating-purposes, it cannot,I be used, -as n'o cement has been found by which a joint between glass and metal-can be made impervious to kerosene.

In order to overcome the latter difficulty, and also to furnish an argand-lamp` at labout the same cost of ordinary atwck lamps, I make the entirebody of i the lamp, including the central air-tube, of glass, asv

. shownin the drawing, which represents a vertical section of a lamp usually called a font-lamp, and 'in which a is the body of the lamp, surmounted by a metal collar,into which the burner is screwed.

b is the central tube, open throughout its entire length,`for supplying air to .the interior surface of the annular flame. I

I inake said tube also of glass, connected solidly with the body a at the bottom, so that it shall form a part of the same.

vThe tube should extend to about the top of the metal collar, or high enough to preventany overflow of oil; and the upper end of the tube should be 'con-` centric with the collar, the burner and wick being introduced through the collar, and outsideof and around the glass tube.

The lamp should br., provided vwith a side aperture, for` convenience in filling.

In case `the'bodyais to be placed upon a metal pedestal, as intahle-lamps, the glass tube may be extended downward, as shown in dottedlines, and the r pedestal attached thereto.-

In the case of Wall-lamps, for halls, &c., the tube b and the burner, opening at the top, may be near the edge of the lamp, instead of in the centre, so as to throw but little shadow upon the door.

The lamp may be provided with feet, if necessary.

I am aware of the existence of a patent, issued, De-

, cember 31, 1867, to A; P. Tyler, in which two tlat glass tubes are arranged to .convey lartical currents of air from a central conical chamber' to either side of a dat wick, the object being to avoid the use of a chimney; but I distinctly disclaim vsuch an arrangep Witnesses:

O. B. ODIORNF, n CHARLES E. ABBOTT. 

